X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem-engraver.cc;h=199d9fd17ea735d1a1c2308324938d694268e208;hb=97a0169312a260933246ab224e4f8b0969871dd5;hp=9af7b217b20a802958e2929658243c2e1e4db8ed;hpb=e24df7c27635dc996c466295eacf2981bddccaf7;p=lilypond.git diff --git a/lily/stem-engraver.cc b/lily/stem-engraver.cc index 9af7b217b2..199d9fd17e 100644 --- a/lily/stem-engraver.cc +++ b/lily/stem-engraver.cc @@ -1,14 +1,28 @@ /* - stem-grav.cc -- implement Stem_engraver + This file is part of LilyPond, the GNU music typesetter. - source file of the GNU LilyPond music typesetter + Copyright (C) 1997--2015 Han-Wen Nienhuys - (c) 1997--2005 Han-Wen Nienhuys + LilyPond is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + LilyPond is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with LilyPond. If not, see . */ +#include "engraver.hh" + #include "context.hh" #include "directional-element-interface.hh" -#include "engraver.hh" +#include "duration.hh" +#include "international.hh" #include "item.hh" #include "misc.hh" #include "rhythmic-head.hh" @@ -16,161 +30,233 @@ #include "staff-symbol-referencer.hh" #include "stem-tremolo.hh" #include "stem.hh" +#include "stream-event.hh" + +#include "translator.icc" -/** - Make stems upon receiving noteheads. - */ class Stem_engraver : public Engraver { Grob *stem_; Grob *tremolo_; - Music *rhythmic_ev_; - Music *tremolo_ev_; - + vector maybe_flags_; + Stream_event *rhythmic_ev_; + Stream_event *tremolo_ev_; + bool tuplet_start_; + TRANSLATOR_DECLARATIONS (Stem_engraver); protected: - void make_stem (Grob_info); - - virtual void acknowledge_grob (Grob_info); - virtual void stop_translation_timestep (); - virtual bool try_music (Music *); + void make_stem (Grob_info, bool); + + void listen_tremolo (Stream_event *); + void listen_tuplet_span (Stream_event *); + void acknowledge_rhythmic_head (Grob_info); + void stop_translation_timestep (); + void finalize (); + void kill_unused_flags (); }; -Stem_engraver::Stem_engraver () +Stem_engraver::Stem_engraver (Context *c) + : Engraver (c) { tremolo_ev_ = 0; stem_ = 0; tremolo_ = 0; rhythmic_ev_ = 0; + tuplet_start_ = false; } void -Stem_engraver::make_stem (Grob_info gi) +Stem_engraver::make_stem (Grob_info gi, bool tuplet_start) { /* Announce the cause of the head as cause of the stem. The stem needs a rhythmic structure to fit it into a beam. */ - stem_ = make_item ("Stem", gi.music_cause ()->self_scm ()); - - /* - docme: why do we take duration-log from request, not from note - head? - */ - int duration_log = gi.music_cause ()->duration_log (); - stem_->set_property ("duration-log", scm_int2num (duration_log)); - + stem_ = make_item ("Stem", gi.grob ()->self_scm ()); + if (tuplet_start) + stem_->set_property ("tuplet-start", SCM_BOOL_T); + (void) make_item ("StemStub", gi.grob ()->self_scm ()); if (tremolo_ev_) { /* Stem tremolo is never applied to a note by default, - is must me requested. But there is a default for the - tremolo value: + it must be requested. But there is a default for the + tremolo value: - c4:8 c c: + c4:8 c c: - the first and last (quarter) note bothe get one tremolo flag. */ + the first and last (quarter) note both get one tremolo flag. */ int requested_type - = scm_to_int (tremolo_ev_->get_property ("tremolo-type")); - SCM f = get_property ("tremoloFlags"); - if (!requested_type) - { - if (scm_is_number (f)) - requested_type = scm_to_int (f); - else - requested_type = 8; - } - else - context ()->set_property ("tremoloFlags", scm_int2num (requested_type)); + = robust_scm2int (tremolo_ev_->get_property ("tremolo-type"), 8); + + /* + we take the duration log from the Event, since the duration-log + for a note head is always <= 2. + */ + Stream_event *ev = gi.event_cause (); + Duration *dur = unsmob (ev->get_property ("duration")); int tremolo_flags = intlog2 (requested_type) - 2 - - (duration_log > 2 ? duration_log - 2 : 0); + - (dur->duration_log () > 2 ? dur->duration_log () - 2 : 0); if (tremolo_flags <= 0) - { - tremolo_ev_->origin ()->warning (_("tremolo duration is too long")); - tremolo_flags = 0; - } + { + tremolo_ev_->origin ()->warning (_ ("tremolo duration is too long")); + tremolo_flags = 0; + } if (tremolo_flags) - { - tremolo_ = make_item ("StemTremolo", tremolo_ev_->self_scm ()); - - /* The number of tremolo flags is the number of flags of the - tremolo-type minus the number of flags of the note itself. */ - tremolo_->set_property ("flag-count", scm_int2num (tremolo_flags)); - tremolo_->set_parent (stem_, X_AXIS); - stem_->set_property ("tremolo-flag", tremolo_->self_scm ()); - tremolo_->set_property ("stem", stem_->self_scm ()); - } + { + tremolo_ = make_item ("StemTremolo", tremolo_ev_->self_scm ()); + + /* The number of tremolo flags is the number of flags of the + tremolo-type minus the number of flags of the note itself. */ + tremolo_->set_property ("flag-count", scm_from_int (tremolo_flags)); + tremolo_->set_parent (stem_, X_AXIS); + stem_->set_object ("tremolo-flag", tremolo_->self_scm ()); + tremolo_->set_object ("stem", stem_->self_scm ()); + } } } void -Stem_engraver::acknowledge_grob (Grob_info gi) +Stem_engraver::acknowledge_rhythmic_head (Grob_info gi) { - if (Rhythmic_head::has_interface (gi.grob_)) + if (Rhythmic_head::get_stem (gi.grob ())) + return; + + Stream_event *cause = gi.event_cause (); + if (!cause) + return; + Duration *d = unsmob (cause->get_property ("duration")); + if (!d) + return; + + if (!stem_) + make_stem (gi, tuplet_start_); + + int ds = Stem::duration_log (stem_); + int dc = d->duration_log (); + + // half notes and quarter notes all have compatible stems. + // Longas are done differently (oops?), so we can't unify + // them with the other stemmed notes. + if (ds == 1) + ds = 2; + if (dc == 1) + dc = 2; + // whole notes and brevis both have no stems + if (ds == -1) + ds = 0; + if (dc == -1) + dc = 0; + + if (ds != dc) { - if (Rhythmic_head::get_stem (gi.grob_)) - return; - - Music * cause = gi.music_cause (); - if (!cause) - return ; - - if (!stem_) - make_stem (gi); - - int duration_log = cause->duration_log (); - if (Stem::duration_log (stem_) != duration_log) - { - // FIXME: - gi.music_cause ()->origin ()->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << Stem::duration_log (stem_))); - - gi.music_cause ()->origin ()->warning (_f ("Don't you want polyphonic voices instead?")); - } - - Stem::add_head (stem_, gi.grob_); + gi.event_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d/%d)", + ds < 0 ? 1 << -ds : 1, + ds > 0 ? 1 << ds : 1)); + gi.event_cause ()->origin ()->warning (_ ("maybe input should specify polyphonic voices")); } + + Stem::add_head (stem_, gi.grob ()); + + if (Stem::is_normal_stem (stem_) + && Stem::duration_log (stem_) > 2 + && !(unsmob (stem_->get_object ("flag")))) + { + Item *flag = make_item ("Flag", stem_->self_scm ()); + flag->set_parent (stem_, X_AXIS); + stem_->set_object ("flag", flag->self_scm ()); + maybe_flags_.push_back (flag); + } + if (tuplet_start_) + stem_->set_property ("tuplet-start", SCM_BOOL_T); +} + +void +Stem_engraver::kill_unused_flags () +{ + for (vsize i = 0; i < maybe_flags_.size (); i++) + if (unsmob (maybe_flags_[i]->get_parent (X_AXIS)->get_object ("beam"))) + maybe_flags_[i]->suicide (); +} + +void +Stem_engraver::finalize () +{ + kill_unused_flags (); } void Stem_engraver::stop_translation_timestep () { + if (scm_is_string (get_property ("whichBar"))) + kill_unused_flags (); + tremolo_ = 0; if (stem_) { /* FIXME: junk these properties. */ SCM prop = get_property ("stemLeftBeamCount"); if (scm_is_number (prop)) - { - Stem::set_beaming (stem_,scm_to_int (prop),LEFT); - context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount")); - } + { + Stem::set_beaming (stem_, scm_to_int (prop), LEFT); + context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount")); + } prop = get_property ("stemRightBeamCount"); if (scm_is_number (prop)) - { - Stem::set_beaming (stem_,scm_to_int (prop), RIGHT); - context ()->unset_property (ly_symbol2scm ("stemRightBeamCount")); - } + { + Stem::set_beaming (stem_, scm_to_int (prop), RIGHT); + context ()->unset_property (ly_symbol2scm ("stemRightBeamCount")); + } stem_ = 0; } + tuplet_start_ = false; tremolo_ev_ = 0; } -bool -Stem_engraver::try_music (Music *m) +void +Stem_engraver::listen_tuplet_span (Stream_event *ev) { - if (m->is_mus_type ("tremolo-event")) + Direction dir = to_dir (ev->get_property ("span-direction")); + if (dir == START) { - tremolo_ev_ = m; - return true; + // set stem property if stem already exists + if (stem_) + stem_->set_property ("tuplet-start", SCM_BOOL_T); + tuplet_start_ = true; // stash the value for use in later creation } - return false; +} + +void +Stem_engraver::listen_tremolo (Stream_event *ev) +{ + ASSIGN_EVENT_ONCE (tremolo_ev_, ev); +} + + +void +Stem_engraver::boot () +{ + ADD_LISTENER (Stem_engraver, tuplet_span); + ADD_LISTENER (Stem_engraver, tremolo); + ADD_ACKNOWLEDGER (Stem_engraver, rhythmic_head); } ADD_TRANSLATOR (Stem_engraver, -/* descr */ "Create stems and single-stem tremolos. It also works together with " -"the beam engraver for overriding beaming.", -/* creats*/ "Stem StemTremolo", -/* accepts */ "tremolo-event", -/* acks */ "rhythmic-head-interface", -/* reads */ "tremoloFlags stemLeftBeamCount stemRightBeamCount", -/* write */ ""); + /* doc */ + "Create stems, flags and single-stem tremolos. It also works" + " together with the beam engraver for overriding beaming.", + + /* create */ + "Flag " + "Stem " + "StemStub " + "StemTremolo ", + + /* read */ + "stemLeftBeamCount " + "stemRightBeamCount " + "whichBar ", + + /* write */ + "" + );